<form name="frmPaper" id="frmPaper" method="post" enctype="multipart/form-data" action="proceso.php">

	<input type="file" name="paperfinal" id="paperfinal" />

		<br/>
	<input type="hidden" name="action" id="action" value="subir-paper-final" />
	<input type="hidden" name="idpaper" id="idpaper" value="<?php echo $_POST["idpaper"]?>" />
	<input type="submit" value="Subir" />
	
</form>	